华盛顿当选美国历史上第一任总统，是因为他制定了美国历史上第一部宪法。[ ]
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It's so cold and you've walked a long way. You _______ be tired. Have a rest. please. [ ]
A. can't
B. might
C. must
D. can
广州市市郊有一旷野古丽的疗养院，建筑物群常200米，宽100米，高20米，该疗养院年预计累计次数为（）次/a。
